I've installed tomcat6 via apt-get on lucid and I'm getting the following in my Tomcat catalina.out on startup:

INFO: The APR based Apache Tomcat Native library which allows optimal performance in
production environments was not found on the java.library.path: /usr/lib/jvm/java-6-
sun-1.6.0.26/jre/lib/i386/client:/usr/lib/jvm/java-6-sun-
1.6.0.26/jre/lib/i386:/usr/lib/jvm/java-6-sun-
1.6.0.26/jre/../lib/i386:/usr/java/packages/lib/i386:/lib:/usr/lib